Standing Waves on a StringThe relationship between frequency, wavelength, and energy absorption for waves on a stretched string is discussed.

Quantum Chemistry

Unique Nodal Patterns at Resonant Frequencies - Square PlateThe development of nodal patterns on a square Chladni plate at resonant frequencies is shown. The wave driver is set at a resonant frequency and sand is scattered on the Chladni plate forming a resonance pattern characteristic of that frequency.

Light as a Particle: Photoelectric EffectThe discovery of the temperature dependence of the spectrum of an incandescent light source and the discovery of the photoelectric effect led to the characterization of the particle-like properties of light. Here we demonstrate these two phenomena.

Quantum Chemistry

Light and ElectronsSome wave-like and particle-like properties of light and some wave-like and particle-like properties of electrons are shown.